escpos_printer.py

from flask import Flask, request, jsonify
from escpos.printer import Usb

app = Flask(__name__)

# Run with sudo
# Configure your USB printer
# Analog Devices, Inc. H58 Printer settings
VENDOR_ID = 0x0456
PRODUCT_ID = 0x0808
INTERFACE = 0
IN_EP = 0x81  # Endpoint for receiving data (typically not used for sending commands)
OUT_EP = 0x03  # Endpoint for sending data to the printer

# Initialize printer
printer = Usb(VENDOR_ID, PRODUCT_ID, in_ep=IN_EP, out_ep=OUT_EP)

@app.route('/print', methods=['POST'])
def print_message():
    """Receives a POST request with JSON containing the message to be printed."""
    data = request.get_json()
    message = data.get('message')
    if message is None:
        return jsonify({"error": "No message provided"}), 400
    
    # Send text to the printer
    try:
        printer.text(message + "\n")
        printer.cut()  # Cut the paper after printing
        return jsonify({"success": "Message printed"}), 200
    except Exception as e:
        return jsonify({"error": str(e)}), 500

if __name__ == '__main__':
    app.run(debug=True, host='0.0.0.0', port=5000)